I received my 901 plugs the other day and they do feed the atty pretty well. The only problem I have is with them turning in the cart and dumping liquid occasionally. These definitely work better than the ones that I had tried to make from the cap.
I'm thinking of trying something more solid or thicker that can fit snugly in the end of the cart. Then maybe a large opening with a membrane of some sort. I have been having luck with simple coffee filter plugs resting on the straw. When made just thick enough, they block fluid flow but allow the negative pressure created on a draw to pull it through the paper.
This suction created when drawing seems to be the key to getting fluid when you want it but without constant or unpredictable flooding.
I'm thinking of trying something more solid or thicker that can fit snugly in the end of the cart. Then maybe a large opening with a membrane of some sort. I have been having luck with simple coffee filter plugs resting on the straw. When made just thick enough, they block fluid flow but allow the negative pressure created on a draw to pull it through the paper.
This suction created when drawing seems to be the key to getting fluid when you want it but without constant or unpredictable flooding.